MOLD DEVICE AND MIRROR PLATE

摘要

A mold device with which a molded article having no residual internal stress and having improved quality can be obtained. The mold device comprises a first plate and a second plate which is disposed face to face with the first plate and is made of the same material as that of the first plate. At least one of the first and second plates has gaps in its surface facing the other plate. Due to the gaps formed in that surface of at least one of the first and second plates which faces the other plate, a molding material present in the cavity can be prevented from suffering local temperature unevenness. With this device, the pattern of a cavity insert can be satisfactorily transferred to heighten the quality of a molded article to be obtained. Since the first and second plates are made of the same material, diffusion bonding can be easily conducted. Furthermore, since the first and second plates have the same coefficient of thermal expansion, the mold device (10) can have improved durability.